In finding this article, I questioned my understanding of the word 'gadget'.
My current understanding is the word is (and please let me know in your answer if I'm right or wrong on this one) synonymous with 'accessory'. The only difference really being that accessory somewhat precedes the technological age. Hence, 'gadget' carries a sort of electronic/technological connotation (but not necessarily?).
The article enumerates a 'backpack' as a gadget. Is that correct?